MCQ Question for Class 12 Chemistry Chapter 7 The p Block Elements

MCQs MCQs Class 12

Check the below NCERT the p Block Elements Class 12 MCQ Questions with Answers available with PDF free download. MCQ Questions for Class 12 Chemistry with Answers were prepared based on the latest syllabus and examination pattern issued by CBSE, NCERT and KVS. Our teachers have provided below The p Block Elements Class 12 Chemistry MCQs Questions with answers which will help students to revise and get more marks in exams

The p Block Elements Class 12 MCQ Questions with Answers

Refer below for the p Block Elements Class 12 MCQ Questions with solutions. Solve questions and compare with the answers provided below

Question. In which of the following compounds, nitrogen exhibits highest oxidation state?
(a) N2H4
(b) NH3
(c) N3H
(d) NH2OH 

Answer

C

Question. Nitrogen forms N2, but phosphorus does not form P2, however, it converts P4, reason is
(a) triple bond present between phosphorus atom
(b) pp – pp bonding is weak
(c) pp – pp bonding is strong
(d) multiple bonds form easily. 

Answer

B

Question. Which of the following oxides is most acidic?
(a) As2O5
(b) P2O5
(c) N2O5
(d) Sb2O5 

Answer

C

Question. Which of the following has the highest dipole moment?
(a) SbH3
(b) AsH3
(c) NH3
(d) PH3 

Answer

C

Question. The basic character of hydrides of the V group elements decreases in the order
(a) NH3 > PH3 > AsH3 > SbH3
(b) SbH3 > AsH3 > PH3 > NH3
(c) SbH3 > PH3 > AsH3 > NH3
(d) NH3 > SbH3 > PH3 > AsH

Answer

A

Question. Among the following oxides, the lowest acidic is
(a) As4O6
(b) As4O10
(c) P4O6
(d) P4O10 

Answer

A

Question. Which of the following fluorides does not exist?
(a) NF5
(b) PF5
(c) AsF5
(d) SbF5 

Answer

A

Question. Which one has the lowest boiling point?
(a) NH3
(b) PH3
(c) AsH3
(d) SbH3

Answer

B

Question. Number of electrons shared in the formation of nitrogen molecule is
(a) 6
(b) 10
(c) 2
(d) 8

Answer

A

Question. Nitrogen is relatively inactive element because
(a) its atom has a stable electronic configuration
(b) it has low atomic radius
(c) its electronegativity is fairly high
(d) dissociation energy of its molecule is fairly high.

Answer

D

Question. Pure nitrogen is prepared in the laboratory by heating a mixture of
(a) NH4OH + NaCl
(b) NH4NO3 + NaCl
(c) NH4Cl + NaOH
(d) NH4Cl + NaNO2

Answer

D

Question. Which of the following statement is not correct for nitrogen?
(a) Its electronegativity is very high.
(b) d-orbitals are available for bonding.
(c) It is a typical non-metal.
(d) Its molecular size is small.

Answer

B

Question. Urea reacts with water to form A which will decompose to form B. B when passed through Cu2+ (aq), deep blue colour solution C is formed. What is the formula of C from the following?
(a) CuSO4
(b) [Cu(NH3)4]2+
(c) Cu(OH)2
(d) CuCO3·Cu(OH)2

Answer

B

Question. Aqueous solution of ammonia consists of
(a) H+
(b) OH
(c) NH4+
(d) NH4+ and OH.

Answer

D

Question. Which of the following oxides of nitrogen is paramagnetic?
(a) NO2
(b) N2O3
(c) N2O
(d) N2O5 

Answer

A

Question. Which of the following is a nitric acid anhydride?
(a) NO
(b) NO2
(c) N2O5
(d) N2O3

Answer

C

Question. When copper is heated with conc. HNO3 it produces
(a) Cu(NO3)2, NO and NO2
(b) Cu(NO3)2 and N2O
(c) Cu(NO3)2 and NO2
(d) Cu(NO3)2 and NO 

Answer

C

Question. Zn gives H2 gas with H2SO4 and HCl but not with HNO3 because
(a) Zn act as oxidising agent when react with HNO3
(b) HNO3 is weaker acid than H2SO4 and HCl
(c) in electrochemical series Zn is above hydrogen
(d) NO3– is reduced in preference to hydronium ion. 

Answer

D

Question. Sugarcane on reaction with nitric acid gives
(a) CO2 and SO2
(b) (COOH)2
(c) 2HCOOH(two moles)
(d) no reaction. 

Answer

B

Question. Which of the following phosphorus is the most reactive?
(a) Scarlet phosphorus
(b) White phosphorus
(c) Red phosphorus
(d) Violet phosphorus

Answer

B

Question. Aqua-regia is
(a) 1 : 3 cone. HNO3 and cone. HCl
(b) 1 : 2 cone. HNO3 and cone. HCl
(c) 3 : 1 conc. HNO3 and cone. HCl
(d) 2 : 1 cone. HNO3 and cone. HCl     

Answer

A

Question. Which of the following is most volatile ? 
(a) HF
(b) HCI
(c) HBr
(d) HI   

Answer

D

Question. Under ambient conditions, the total number of gases released as products in the final step of the reaction scheme shown below is 

MCQs Class 12 Chemistry Chapter 7 The p Block Elements

(a) 0
(b) 1
(c) 2
(d) 3     

Answer

C

Question. Which one of the following is used for the separation of noble gas mixture from air ? 
(a) Charcoal
(b) 90% CaC2 + 10% CaCl2
(c) Soda lime + potash solution
(d) 90% CaCO3 + 10% urea   

Answer

B

Question. In Ramsay and Rayleigh’s isolation of noble gases from air, the nitrogen of the air is finally converted into
(a) NaNO2 only
(b) NO and NO2
(c) NaNOonly
(d) NaNO2 and NaNO3     

Answer

D

Question. Molecules of a noble gas do not posses vibrational energy because a noble gas
(a) is monoatomic
(b) is chemically inert
(c) has completely filled shells
(d) is diamagnetic       

Answer

A

 Question. Which of the following pair have identical shape ?
(a) CH4 , SF4
(b) BCI3 , ClF3
(c) XeF2, ZnCl2
(d) SO2 , CO2     

Answer

C

Question. The correct order of pseudohalide, polyhalide and interhalogen are 
(a) BrI2 , OCN , IF5
(b) IF5 , BrI2 , OCN
(c) OCN , IF5 , BrI2
(d) OCN- , BrI2, IF5   

Answer

D

Question. The structure of XeF6 is experimentally determined to be distorted octahedron. Its structure according to VSEPR theory is
(a) octahedron
(b) trigonal bi pyramid
(c) pentagonal bi pyramid
(d) tetragonal bipyramid       

Answer

C

Question. Platinum, palladium and iridium are called noble metals because
(a) Alfred Nobel discovered them
(b) they are found in native state
(c) they are shining lustrous and pleasing to look at
(d) they are inert towards many common reagents     

Answer

D

Question. Helium-oxygen mixture is used by deep sea divers in preference to nitrogen-oxygen mixture because 
(a) helium is much less soluble in blood than nitrogen
(b) nitrogen is much less soluble in blood than helium
(c) due to high pressure deep under the sea nitrogen and oxygen react to give poisonous nitric oxide
(d) nitrogen is highly soluble in water      

Answer

A

Question. The structure of XeOF4 is
(a) trigonal bipyramidal
(b) square planar
(c) square pyramidal
(d) pyramidal   

Answer

C

Question. The molecular ion XF2 bas three pairs of non-bonding electrons around the central atom. The bond angle F—X—F will be closest to
(a) 180°
(b) 120°
(c) 109°
(d) 90°   

Answer

A

Question. Which of the following sets have correctly matched each molecule or ion and its geometry ?   

MCQs Class 12 Chemistry Chapter 7 The p Block Elements
Answer

B

Question. Which of the following pairs contains isoelectronic species ? 
(a) Be and Li+
(b) p+ and s
(c) N2- and Ne
(d) O2- and Na+   

Answer

D

Question. Which of the following sets has the atoms and/or ions in the correct order of increasing size ? 
(a) Ne < F < O2-
(b) Br < Cl < F
(c) Na+ < Mg2+ < Al3+
(d) P < S < Cl     

Answer

A

Question. The unbalanced chemical reactions given in Column I show missing reagent or condition (?) which are provided in Column II. Match Column I with Column II and select the correct answer using the codes given below the columns. 

MCQs Class 12 Chemistry Chapter 7 The p Block Elements

Codes 
     A  B  C  D  E
(a) 3  2  5  4  1
(b) 5  3  2  4  1
(c) 1  4  5  2  3
(d) 1  2  3  4  5     

Answer

D

Question. Which of the following is the life saving mixture for an asthma patient? 
(a) Mixture of helium and oxygen
(b) Mixture of neon and oxygen
(c) Mixture of xenon and nitrogen
(d) Mixture of argon and oxygen     

Answer

A

Question. Which one of the following reaction of xenon compounds is not feasible? 
(a) XeO3 + 6HF → XeF6 + 3H2O
(b) 3XeF4 + 6H2O → 2Xe + XeO3+ 12HF + 1.5 O2
(c) 2XeF2 + 2H2O → 2Xe + 4HF + O2
(d) XeF6 + RbF → Rb[XeF7 ]     

Answer

A

Question. Argon is used 
(a) in filling airships
(b) to obtain low temperature
(c) in high temperature welding
(d) in radiotherapy for treatment of cancer     

Answer

C

Question. Each of the following is true for white and red phosphorus except that they
(a) are both soluble in CS2
(b) can be oxidised by heating in air
(c) consist of the same kind of atoms
(d) can be converted into one another.

Answer

A

Question. A compound ‘X’ upon reaction with H2O produces a colourless gas ‘Y’ with rotten fish smell. Gas ‘Y’ is absorbed in a solution of CuSO4 to give Cu3P2 as one of the products. Predict the compound ‘X’.
(a) Ca3P2
(b) NH4Cl
(c) As2O3
(d) Ca3(PO4)2

Answer

A

Question. PH4I + NaOH forms
(a) PH3
(b) NH3
(c) P4O6
(d) P4O10

Answer

A

Question. Identify the incorrect statement related to PCl5 from the following :
(a) PCl5 molecule is non-reactive.
(b) Three equatorial P – Cl bonds make an angle of 120° with each other.
(c) Two axial P – Cl bonds make an angle of 180° with each other.
(d) Axial P – Cl bonds are longer than equatorial P – Cl bonds.

Answer

A

Question. PCl3 reacts with water to form
(a) PH3
(b) H3PO3, HCl
(c) POCl3
(d) H3PO4

Answer

B

Question. Which of the following oxoacids of phosphorus has strongest reducing property?
(a) H4P2O7
(b) H3PO3
(c) H3PO2
(d) H3PO4

Answer

C

Question. Which is the correct statement for the given acids?
(a) Phosphinic acid is a monoprotic acid while phosphonic acid is a diprotic acid.
(b) Phosphinic acid is a diprotic acid while phosphonic acid is a monoprotic acid.
(c) Both are diprotic acids.
(d) Both are triprotic acids. 

Answer

A

Question. Strong reducing behaviour of H3PO2 is due to
(a) high electron gain enthalpy of phosphorus
(b) high oxidation state of phosphorus
(c) presence of two —OH groups and one P—H bond
(d) presence of one —OH group and two P—H bonds. 

Answer

D

Question. Which of the following statements is not valid for oxoacids of phosphorus?
(a) Orthophosphoric acid is used in the manufacture of triple superphosphate.
(b) Hypophosphorous acid is a diprotic acid.
(c) All oxoacids contain tetrahedral four coordinated phosphorus.
(d) All oxoacids contain atleast one P O unit and one P—OH group.

Answer

B

Question. Oxidation states of P in H4P2O5, H4P2O6, H4P2O7 are respectively
(a) +3, +5, +4
(b) +5, +3, +4
(c) +5, +4, +3
(d) +3, +4, +5

Answer

D

Question. How many bridging oxygen atoms are present in P4O10?
(a) 6
(b) 4
(c) 2
(d) 5

Answer

A

Question. H3PO2 is the molecular formula of an acid of phosphorus. Its name and basicity respectively are
(a) phosphorous acid and two
(b) hypophosphorous acid and two
(c) hypophosphorous acid and one
(d) hypophosphoric acid and two. 

Answer

C

Question. Which one of the following substance is used in the laboratory for fast drying of neutral gases?
(a) Phosphorus pentoxide
(b) Active charcoal
(c) Anhydrous calcium chloride
(d) Na3PO4 

Answer

A

Question. P2O5 is heated with water to give
(a) hypophosphorous acid
(b) phosphorous acid
(c) hypophosphoric acid
(d) orthophosphoric acid. 

Answer

D

Question. Basicity of orthophosphoric acid is
(a) 2
(b) 3
(c) 4
(d) 5 

Answer

B

Question. When orthophosphoric acid is heated to 600°C, the product formed is
(a) PH3
(b) P2O5
(c) H3PO3
(d) HPO3

Answer

D

Question. Which is the correct thermal stability order for H2E (E = O, S, Se, Te and Po) ?
(a) H2Se < H2Te < H2Po < H2O < H2S
(b) H2S < H2O < H2Se < H2Te <H2Po
(c) H2O < H2S < H2Se <H2Te < H2Po
(d) H2Po < H2Te < H2Se < H2S < H2

Answer

D

Question. Acidity of diprotic acids in aqueous solutions increases in the order
(a) H2S < H2Se < H2Te
(b)H2Se <H2S < H2Te
(c) H2Te < H2S < H2Se
(d) H2Se <H2Te < H2S

Answer

A

Question. Which of the following bonds has the highest energy?
(a) S–S
(b) O–O
(c) Se–Se
(d) Te–Te

Answer

A

Question. Which of the following does not give oxygen on heating?
(a) K2Cr2O7
(b) (NH4)2Cr2O7
(c) KClO3
(d) Zn(ClO3)2

Answer

B

MCQ-Question-for-Class-12-Chemistry-Chapter-7-P Block-Elements.jpg

P Block Elements Class 12 MCQ has been gathered for students to rehearse. Students can prepare this MCQ on P-Block Elements Class 12 Pdf. Each question has four choices with answers. Firstly, Solve all these Questions and check your answer with the right answer. If your answers do not match with the right answer, Don’t worry try again because You need to prepare daily to score higher marks in the Class 12 Chemistry Exam.

We hope you liked the p Block Elements Class 12 MCQ Questions with answers provided above. In case you have any questions please post them in the comments section below and our Chemistry teachers will provide a response.

We hope this Class 12 P-block elements MCQs with Answers pdf shared with you will help you to get good marks in your exam. We have also other study materials like NCERT Solutions, NCERT Book, Exam Question, and sampler paper of Class 12. If You want to score higher in your exam, So practice all this study material and if you have any problem in regard to the P Block MCQ Class 12 pdf then, write it in the comment box and we will guide you as much as possible.

1 thought on “MCQ Question for Class 12 Chemistry Chapter 7 The p Block Elements

Comments are closed.